Running the world's largest art museum requires a well-orchestrated effort to keep everything's ship-shape.

Coming up today on Travel with Rick Steves, Elaine Sholino takes us behind the scenes at the Louvre in Paris.

She tells us what goes on when the museum is closed to the public on Tuesdays.

You've got to worry about the moths and the tapestries.

Richard Rhodes had the rare privilege of being the last apprentice

and the only non-Italian in over 700 years to be trained by the Freemasons Guild in Tuscany.

They taught him the closely guarded sacred rules of medieval stone masonry.

As a material, it's capable of so much visual expression.

Richard helps us see how rock fashioned into stonework and art is core to our humanity through the ages. It wears and weathers and becomes something better through its interaction with man.

Take a peek inside the Louvre on its day off and get a feel for the art of stone.

It's just ahead on today's travel with Rick Steves.

It's been said that there are occasions when even the stones can cry out.

If you've ever had the chance to walk on a 2,000-year-old Roman road,

you've felt the graciously weathered stones beneath your feet.

Or if you've ever stood in awe in front of an Egyptian pyramid or Inca temple,

or even when you admire the work of a craftsman or artists closer from home,

you'll know that great stonework can sometimes seem to have a pulse.

Richard Rhodes was the last apprentice

to be trained by the Stoneworkers Guild of Tuscany.

They taught him the techniques mastered by medieval

cathedral builders and Renaissance artists,

the people whose masterpieces are often highlights

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